c
2020 Sun Hydraulics 1 of 2
MODEL
DSIY
3-way, 2-position, vent-to-shift diverter valve, normally open
SERIES 4 / CAPACITY: 480 L/min. / CAVITY: T-34A
(X)CONTROL
X Not Adjustable
(E)MINIMUM CONTROL PRESSURE
E 75 psi (5 bar)
C 30 psi (2 bar)
D 50 psi (3,5 bar)
(N)SEAL MATERIAL
N Buna-N
V Viton
MATERIAL/COATING
Standard Material/Coating
/AP Stainless Steel, Passivated
NOTE: DATA MAY VARY BY CONFIGURATION. SEE CONFIGURATION SECTION.
This vent-to-shift diverter valve is a 2-position, 3-way cartridge that is normally open from port 3 to port 4. When
port 1 is vented, the pressure differential between port 3 and port 1 exceeds the spring force causing the valve to
shift, thereby connecting port 3 to port 2.
TECHNICAL DATA
Cavity T-34A
Series 4
Capacity 480 L/min.
Maximum Operating Pressure 350 bar
Nominal Vent Flow 0,60 L/min.
Valve Hex Size 41,3 mm
Valve Installation Torque 474 - 508 Nm
Seal kit - Cartridge Buna: 990034007
Seal kit - Cartridge Polyurethane: 990034002
Seal kit - Cartridge Viton: 990034006
Model Weight 1.58 kg.
sunhydraulics.com/model/DSIY
Model Code Example: DSIYXENCONFIGURATION OPTIONS
c
2020 Sun Hydraulics 2 of 2
TECHNICAL FEATURES
This valve is not bistable; it is capable of modulating between the two positions shown.
Vent flow out of port 1 is pressure compensated and is listed in Technical Data.
There must be a pressure source at port 3, relative to port 1, to shift the valve.
One application of this valve is to be used in pairs to select between 2 motors or pumps.
One pilot valve may be used to vent multiple diverter valves if blocking checks are used at port 1 of each diverter. If blocking checks are not used there will be
interaction between high and low pressure legs of the circuit.
The vent-to-shift function is self cleaning and therefore insensitive to contamination.
Hardened spool and sleeve provide consistent and low spool leakage rates and excellent wear characteristics.
Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge
machining variations.
PERFORMANCE CURVES
